Zhang Wenbin, Lin Munan, Li Haibo, Qi Xin
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.
School of Nuclear Sciences and Technology, University of Chinese Academy of Sciences, Beijing 100049, China.
Rev Sci Instrum. 2024 Jun 1;95(6). doi: 10.1063/5.0203542.
Ferrite-loaded gyromagnetic nonlinear transmission line (GNLTL) provides a possible option to compress an input pulse to a narrower width for its remarkable sharpening effect. However, it is difficult to accurately predict the output of the GNLTL due to the complex interaction between the magnetic moment of ferrite and the bias magnetic field. In this paper, a finite element model of the GNLTL is established based on the Landau-Lifshitz-Gilbert equation to investigate the performance of the GNLTL. To validate this model, a prototype is used for experimental comparison. The result demonstrates good agreement between experiment and simulation. This paper further explores the influence of the bias magnetic field and the length of the GNLTL on the output pulse. Moreover, a method to sharpen the falling edge is proposed based on the reflection and superposition of the GNLTL output. Simulation and experimental results show its effectiveness and feasibility.
加载铁氧体的旋磁非线性传输线（GNLTL）因其显著的锐化效应为将输入脉冲压缩至更窄宽度提供了一种可能的选择。然而，由于铁氧体磁矩与偏置磁场之间复杂的相互作用，准确预测GNLTL的输出较为困难。本文基于朗道 - 里夫希茨 - 吉尔伯特方程建立了GNLTL的有限元模型，以研究GNLTL的性能。为验证该模型，使用了一个原型进行实验对比。结果表明实验与模拟结果吻合良好。本文进一步探讨了偏置磁场和GNLTL长度对输出脉冲的影响。此外，基于GNLTL输出的反射和叠加提出了一种锐化下降沿的方法。模拟和实验结果表明了其有效性和可行性。
